Cov kua qaub Methacrylic (2-Methyl-2-propenoic acid)
| Cov yam ntxwv tshuaj lom neeg | Methacrylic acid, luv luv MAA, yog ib qho organic compound. Cov kua no tsis muaj xim, viscous yog ib qho carboxylic acid nrog ib qho tsw tsis zoo. Nws yaj tau hauv dej sov thiab sib xyaw nrog feem ntau cov organic solvents. Methacrylic acid yog tsim los ntawm kev lag luam ntawm qhov loj me ua ib qho precursor rau nws cov esters, tshwj xeeb tshaj yog methyl methacrylate (MMA) thiab poly (methyl methacrylate) (PMMA). Cov methacrylates muaj ntau yam kev siv, feem ntau yog hauv kev tsim cov polymers nrog cov npe lag luam xws li Lucite thiab Plexiglas. MAA tshwm sim ntuj hauv cov nqi me me hauv cov roj ntawm Roman chamomile. | |
| Cov ntawv thov | Methacrylic acid yog siv rau hauv kev tsim cov methacrylate resins thiab plastics. Nws yog siv ua Monomer rau cov resins thiab polymers loj, organic synthesis. Ntau yam ntawm cov polymers yog raws li esters ntawm cov kua qaub, raws li methyl, butyl, lossis isobutyl esters. Methacrylic acid thiab methacrylate esters yog siv los npaj ntau yam polymers [→ Polyacrylamides thiab Poly(Acrylic Acids), → Polymethacrylates]. Poly(methyl methacrylate) yog lub polymer tseem ceeb hauv pawg no, thiab nws muab cov dej-ntshiab, tawv plastics uas siv rau hauv daim ntawv hauv glazing, cov paib, cov zaub, thiab cov teeb pom kev zoo. | |
| Lub cevform | Ntshiabkua | |
| Chav Kawm Txog Kev Phom Sij | 8 | |
| Lub neej txee | Raws li peb qhov kev paub dhau los, cov khoom no tuaj yeem khaws cia tau 12 lub hlis txij li hnub xa khoom yog tias khaws cia rau hauv cov thawv kaw ruaj ruaj, tiv thaiv kom tsis txhob muaj lub teeb thiab cua sov thiab khaws cia rau qhov kub ntawm 5 - 30 ° C. | |
| Tcov yam ntxwv ib txwm muaj
| Qhov kub yaj | 12-16 ° C (lit.) |
| Kub taw tes | 163 ° C (lit.) | |
| qhov ceev | 1.015 g/mL ntawm 25 °C (lit.) | |
| qhov ceev ntawm cov pa dej | >3 (piv rau huab cua) | |
| siab ntawm cov pa dej | 1 hli Hg ( 20 °C) | |
| refractive index | n20/D 1.431 (lit.) | |
| Fp | 170 °F | |
| cia kub. | Khaws cia ntawm +15 ° C txog +25 ° C. | |
Kev Nyab Xeeb
Thaum siv cov khoom no, thov ua raws li cov lus qhia thiab cov ntaub ntawv muab rau hauv daim ntawv qhia kev nyab xeeb thiab ua raws li kev tiv thaiv thiab kev tu cev huv si hauv chaw ua haujlwm kom txaus rau kev siv cov tshuaj lom neeg.
Lus Cim
Cov ntaub ntawv muaj nyob rau hauv tsab ntawv tshaj tawm no yog raws li peb txoj kev paub thiab kev paub tam sim no. Vim muaj ntau yam uas yuav cuam tshuam rau kev ua thiab kev siv peb cov khoom, cov ntaub ntawv no tsis pab cov neeg ua haujlwm los ntawm kev ua lawv tus kheej txoj kev tshawb nrhiav thiab kev sim; cov ntaub ntawv no tsis txhais tau tias muaj kev lees paub txog qee yam khoom, lossis qhov tsim nyog ntawm cov khoom rau lub hom phiaj tshwj xeeb. Txhua cov lus piav qhia, cov duab kos, cov duab, cov ntaub ntawv, cov feem pua, qhov hnyav, thiab lwm yam uas tau muab rau hauv no yuav hloov pauv yam tsis muaj cov ntaub ntawv ua ntej thiab tsis suav tias yog qhov zoo ntawm cov khoom raws li daim ntawv cog lus. Qhov zoo ntawm cov khoom raws li daim ntawv cog lus tsuas yog los ntawm cov lus hais hauv cov lus qhia tshwj xeeb ntawm cov khoom. Nws yog lub luag haujlwm ntawm tus neeg tau txais peb cov khoom kom ntseeg tau tias txhua txoj cai thiab cov kev cai lij choj thiab kev cai lij choj uas twb muaj lawm raug ua raws li.
